Planning a quick getaway from San Francisco to Seattle? FareRadius helps you find the best deals for a budget-friendly weekend trip. You'll fly from San Francisco International Airport (SFO) to Seattle-Tacoma International Airport (SEA). While direct flights are available with United Airlines and Alaska Airlines, you can often find cheaper options with one transfer. The cheapest flight we found is just $57 in November 2026, making it the ideal month for savings.
To snag the lowest prices, be flexible with your travel dates. Our calendar below shows that November 2026 offers the best value, with prices starting at $57. In contrast, September 2027 is the priciest month at $171. Keep an eye on flights with Frontier Airlines for the lowest fares, even if it means a layover. A little planning can save you a lot!
FAQ
How much is a flight from San Francisco to Seattle?
The cheapest one-way ticket is $57 right now (Nov 17, Frontier Airlines, 1 stop).
Are there nonstop flights from San Francisco to Seattle?
Yes — United Airlines, Alaska Airlines fly nonstop; the flight takes about 2h 9m.
When is it cheapest to fly from San Francisco to Seattle?
in November from $57; priciest in September (from $171).
Which airport will I arrive at in Seattle?
All flights from San Francisco to Seattle will arrive at Seattle-Tacoma International Airport (SEA).
What is the best way to find the absolute cheapest dates for this route?
The best way to find the cheapest dates is to be flexible. Our data shows November 2026 is the cheapest month, with prices starting at $57. Check the calendar below for specific dates, as prices can vary even within the same month.